java -Xss1g -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.9.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 14:35:10,357 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 14:35:10,359 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 14:35:10,370 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 14:35:10,370 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 14:35:10,371 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 14:35:10,372 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 14:35:10,376 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 14:35:10,378 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 14:35:10,379 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 14:35:10,379 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 14:35:10,380 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 14:35:10,380 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 14:35:10,381 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 14:35:10,382 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 14:35:10,383 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 14:35:10,385 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 14:35:10,395 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 14:35:10,397 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 14:35:10,398 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 14:35:10,399 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 14:35:10,402 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 14:35:10,402 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 14:35:10,402 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 14:35:10,403 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 14:35:10,407 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 14:35:10,408 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 14:35:10,408 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 14:35:10,409 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 14:35:10,409 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 14:35:10,410 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 14:35:10,411 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 14:35:10,411 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 14:35:10,412 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 14:35:10,412 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 14:35:10,413 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf [2018-06-22 14:35:10,427 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 14:35:10,427 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 14:35:10,428 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 14:35:10,428 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 14:35:10,429 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 14:35:10,429 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 14:35:10,429 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 14:35:10,429 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 14:35:10,430 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 14:35:10,430 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 14:35:10,430 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:35:10,430 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 14:35:10,430 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 14:35:10,430 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 14:35:10,431 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 14:35:10,437 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 14:35:10,437 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 14:35:10,437 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 14:35:10,438 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 14:35:10,439 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 14:35:10,439 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 14:35:10,482 INFO ]: Repository-Root is: /tmp [2018-06-22 14:35:10,495 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 14:35:10,500 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 14:35:10,501 INFO ]: Initializing SmtParser... [2018-06-22 14:35:10,501 INFO ]: SmtParser initialized [2018-06-22 14:35:10,502 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.9.smt2 [2018-06-22 14:35:10,503 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-22 14:35:10,592 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.9.smt2 unknown [2018-06-22 14:35:16,227 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.9.smt2 [2018-06-22 14:35:16,233 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 14:35:16,241 INFO ]: Walking toolchain with 4 elements. [2018-06-22 14:35:16,242 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 14:35:16,242 INFO ]: Initializing ChcToBoogie... [2018-06-22 14:35:16,242 INFO ]: ChcToBoogie initialized [2018-06-22 14:35:16,246 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:35:16" (1/1) ... [2018-06-22 14:35:16,355 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:35:16 Unit [2018-06-22 14:35:16,356 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 14:35:16,356 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 14:35:16,356 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 14:35:16,356 INFO ]: Boogie Preprocessor initialized [2018-06-22 14:35:16,381 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:35:16" (1/1) ... [2018-06-22 14:35:16,381 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:35:16" (1/1) ... [2018-06-22 14:35:16,477 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:35:16" (1/1) ... [2018-06-22 14:35:16,477 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:35:16" (1/1) ... [2018-06-22 14:35:16,533 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:35:16" (1/1) ... [2018-06-22 14:35:16,535 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:35:16" (1/1) ... [2018-06-22 14:35:16,563 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:35:16" (1/1) ... [2018-06-22 14:35:16,596 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 14:35:16,598 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 14:35:16,598 INFO ]: Initializing RCFGBuilder... [2018-06-22 14:35:16,598 INFO ]: RCFGBuilder initialized [2018-06-22 14:35:16,599 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:35:16" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-22 14:35:16,653 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 14:35:16,653 INFO ]: Found specification of procedure False [2018-06-22 14:35:16,653 INFO ]: Found implementation of procedure False [2018-06-22 14:35:16,653 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 14:35:16,653 INFO ]: Found specification of procedure state [2018-06-22 14:35:16,653 INFO ]: Found implementation of procedure state [2018-06-22 14:35:16,653 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 14:35:16,653 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 14:35:16,653 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:35:20,924 INFO ]: Using library mode [2018-06-22 14:35:20,924 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:35:20 BoogieIcfgContainer [2018-06-22 14:35:20,924 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 14:35:20,926 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 14:35:20,926 INFO ]: Initializing TraceAbstraction... [2018-06-22 14:35:20,929 INFO ]: TraceAbstraction initialized [2018-06-22 14:35:20,929 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:35:16" (1/3) ... [2018-06-22 14:35:20,930 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29051e14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 02:35:20, skipping insertion in model container [2018-06-22 14:35:20,930 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:35:16" (2/3) ... [2018-06-22 14:35:20,930 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29051e14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 02:35:20, skipping insertion in model container [2018-06-22 14:35:20,930 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:35:20" (3/3) ... [2018-06-22 14:35:20,932 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 14:35:20,942 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 14:35:20,960 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 14:35:21,016 INFO ]: Using default assertion order modulation [2018-06-22 14:35:21,017 INFO ]: Interprodecural is true [2018-06-22 14:35:21,017 INFO ]: Hoare is false [2018-06-22 14:35:21,017 INFO ]: Compute interpolants for FPandBP [2018-06-22 14:35:21,017 INFO ]: Backedges is TWOTRACK [2018-06-22 14:35:21,017 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 14:35:21,017 INFO ]: Difference is false [2018-06-22 14:35:21,017 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 14:35:21,017 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 14:35:21,037 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 14:35:21,053 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 14:35:21,053 INFO ]: Found error trace [2018-06-22 14:35:21,054 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:35:21,054 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:35:21,063 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 14:35:21,067 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:35:21,067 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:35:21,114 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:35:21,114 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:35:21,114 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:35:21,292 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:35:21,531 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 14:35:21,533 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 14:35:21,533 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 14:35:21,535 INFO ]: Interpolant automaton has 4 states [2018-06-22 14:35:21,556 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 14:35:21,556 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:35:21,559 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 14:35:21,965 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:35:21,965 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 14:35:21,968 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 14:35:21,969 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 14:35:21,969 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:35:21,986 INFO ]: With dead ends: 13 [2018-06-22 14:35:21,986 INFO ]: Without dead ends: 13 [2018-06-22 14:35:21,988 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:35:22,008 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 14:35:22,063 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 14:35:22,065 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 14:35:22,065 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 14:35:22,067 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 14:35:22,067 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:35:22,067 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 14:35:22,067 INFO ]: Interpolant automaton has 4 states. [2018-06-22 14:35:22,068 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 14:35:22,069 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 14:35:22,069 INFO ]: Found error trace [2018-06-22 14:35:22,069 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:35:22,069 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:35:22,069 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 14:35:22,069 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:35:22,070 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:35:22,070 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:35:22,070 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:35:22,070 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:35:22,822 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:35:23,945 WARN ]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-22 14:35:24,330 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:35:24,330 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:35:24,330 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:35:24,345 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:35:24,927 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:35:24,981 INFO ]: Computing forward predicates... [2018-06-22 14:35:25,185 WARN ]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 4 [2018-06-22 14:35:31,987 WARN ]: Spent 2.43 s on a formula simplification. DAG size of input: 31 DAG size of output: 18 [2018-06-22 14:35:32,151 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:35:32,182 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:35:32,182 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-22 14:35:32,183 INFO ]: Interpolant automaton has 10 states [2018-06-22 14:35:32,183 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 14:35:32,183 INFO ]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-06-22 14:35:32,183 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 10 states. [2018-06-22 14:35:32,930 WARN ]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-06-22 14:35:33,453 WARN ]: Spent 362.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2018-06-22 14:35:33,717 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:35:33,717 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 14:35:33,720 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 14:35:33,720 INFO ]: Start accepts. Automaton has 10 states. Word has length 13 [2018-06-22 14:35:33,720 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:35:33,720 INFO ]: With dead ends: 17 [2018-06-22 14:35:33,720 INFO ]: Without dead ends: 17 [2018-06-22 14:35:33,721 INFO ]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2018-06-22 14:35:33,722 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 14:35:33,726 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 14:35:33,726 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 14:35:33,727 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 14:35:33,727 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2018-06-22 14:35:33,727 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:35:33,727 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 14:35:33,727 INFO ]: Interpolant automaton has 10 states. [2018-06-22 14:35:33,727 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 14:35:33,728 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 14:35:33,728 INFO ]: Found error trace [2018-06-22 14:35:33,728 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:35:33,728 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:35:33,728 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 2 times [2018-06-22 14:35:33,728 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:35:33,728 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:35:33,732 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:35:33,732 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:35:33,732 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:35:35,078 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:35:36,963 WARN ]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-22 14:35:37,157 WARN ]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-22 14:35:37,432 WARN ]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-22 14:35:37,662 WARN ]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-06-22 14:35:37,731 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:35:37,731 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:35:37,731 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:35:37,738 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 14:35:38,741 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 14:35:38,741 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:35:38,847 INFO ]: Computing forward predicates... [2018-06-22 14:35:45,172 WARN ]: Spent 506.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 36 [2018-06-22 14:35:50,297 WARN ]: Spent 2.55 s on a formula simplification. DAG size of input: 82 DAG size of output: 65 [2018-06-22 14:35:50,553 INFO ]: Checked inductivity of 21 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:35:50,586 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:35:50,586 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2018-06-22 14:35:50,586 INFO ]: Interpolant automaton has 16 states [2018-06-22 14:35:50,587 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-22 14:35:50,588 INFO ]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2018-06-22 14:35:50,588 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 16 states. [2018-06-22 14:35:50,909 WARN ]: Spent 114.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 23 [2018-06-22 14:35:51,433 WARN ]: Spent 472.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 41 [2018-06-22 14:35:52,544 WARN ]: Spent 1.05 s on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2018-06-22 14:35:52,661 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:35:52,661 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 14:35:52,667 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 14:35:52,667 INFO ]: Start accepts. Automaton has 16 states. Word has length 21 [2018-06-22 14:35:52,667 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:35:52,668 INFO ]: With dead ends: 19 [2018-06-22 14:35:52,668 INFO ]: Without dead ends: 19 [2018-06-22 14:35:52,668 INFO ]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2018-06-22 14:35:52,668 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 14:35:52,671 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 14:35:52,671 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 14:35:52,672 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 14:35:52,672 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 14:35:52,672 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:35:52,672 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 14:35:52,672 INFO ]: Interpolant automaton has 16 states. [2018-06-22 14:35:52,672 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 14:35:52,673 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 14:35:52,673 INFO ]: Found error trace [2018-06-22 14:35:52,673 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:35:52,673 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:35:52,673 INFO ]: Analyzing trace with hash 1762711629, now seen corresponding path program 3 times [2018-06-22 14:35:52,673 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:35:52,673 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:35:52,674 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:35:52,674 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:35:52,674 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:35:53,888 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:35:56,100 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 14:35:56,101 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:35:56,101 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:35:56,109 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 14:35:57,400 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-06-22 14:35:57,400 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:35:57,516 INFO ]: Computing forward predicates... [2018-06-22 14:35:59,827 WARN ]: Spent 572.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 34 Received shutdown request... [2018-06-22 14:36:02,859 INFO ]: Timeout while computing interpolants [2018-06-22 14:36:03,059 WARN ]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:36:03,060 WARN ]: Verification canceled [2018-06-22 14:36:03,064 WARN ]: Timeout [2018-06-22 14:36:03,064 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 02:36:03 BoogieIcfgContainer [2018-06-22 14:36:03,064 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 14:36:03,065 INFO ]: Toolchain (without parser) took 46830.78 ms. Allocated memory was 620.8 MB in the beginning and 1.6 GB in the end (delta: 1.0 GB). Free memory was 239.5 MB in the beginning and 1.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.0 GB. Max. memory is 3.6 GB. [2018-06-22 14:36:03,065 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 303.0 MB. Free memory is still 266.5 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 14:36:03,065 INFO ]: ChcToBoogie took 114.13 ms. Allocated memory is still 620.8 MB. Free memory was 239.5 MB in the beginning and 232.0 MB in the end (delta: 7.6 MB). Peak memory consumption was 7.6 MB. Max. memory is 3.6 GB. [2018-06-22 14:36:03,066 INFO ]: Boogie Preprocessor took 239.86 ms. Allocated memory is still 620.8 MB. Free memory was 232.0 MB in the beginning and 224.4 MB in the end (delta: 7.6 MB). Peak memory consumption was 7.6 MB. Max. memory is 3.6 GB. [2018-06-22 14:36:03,066 INFO ]: RCFGBuilder took 4326.78 ms. Allocated memory was 620.8 MB in the beginning and 892.9 MB in the end (delta: 272.1 MB). Free memory was 224.4 MB in the beginning and 569.2 MB in the end (delta: -344.8 MB). Peak memory consumption was 374.1 MB. Max. memory is 3.6 GB. [2018-06-22 14:36:03,066 INFO ]: TraceAbstraction took 42138.20 ms. Allocated memory was 892.9 MB in the beginning and 1.6 GB in the end (delta: 756.0 MB). Free memory was 569.2 MB in the beginning and 1.4 GB in the end (delta: -858.3 MB). Peak memory consumption was 1.1 GB. Max. memory is 3.6 GB. [2018-06-22 14:36:03,068 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 303.0 MB. Free memory is still 266.5 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 114.13 ms. Allocated memory is still 620.8 MB. Free memory was 239.5 MB in the beginning and 232.0 MB in the end (delta: 7.6 MB). Peak memory consumption was 7.6 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 239.86 ms. Allocated memory is still 620.8 MB. Free memory was 232.0 MB in the beginning and 224.4 MB in the end (delta: 7.6 MB). Peak memory consumption was 7.6 MB. Max. memory is 3.6 GB. * RCFGBuilder took 4326.78 ms. Allocated memory was 620.8 MB in the beginning and 892.9 MB in the end (delta: 272.1 MB). Free memory was 224.4 MB in the beginning and 569.2 MB in the end (delta: -344.8 MB). Peak memory consumption was 374.1 MB. Max. memory is 3.6 GB. * TraceAbstraction took 42138.20 ms. Allocated memory was 892.9 MB in the beginning and 1.6 GB in the end (delta: 756.0 MB). Free memory was 569.2 MB in the beginning and 1.4 GB in the end (delta: -858.3 MB). Peak memory consumption was 1.1 GB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was analyzing trace of length 26 with TraceHistMax 5, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 135 quantified variables from 25 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 42.0s OverallTime, 4 OverallIterations, 5 TraceHistogramMax, 4.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 34 SDtfs, 28 SDslu, 100 SDs, 0 SdLazy, 72 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 10.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.6s SsaConstructionTime, 3.2s SatisfiabilityAnalysisTime, 23.4s InterpolantComputationTime, 77 NumberOfCodeBlocks, 77 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 72 ConstructedInterpolants, 0 QuantifiedInterpolants, 26168 SizeOfPredicates, 3888 NumberOfNonLiveVariables, 5444 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 16/48 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/token_ring.9.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_14-36-03-076.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/token_ring.9.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_14-36-03-076.csv Completed graceful shutdown